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(A) Scanning electron microscopy images taken at (1) bare Au electrode surface, (2) Pt-B modified electrode surface, and (3) Pt-B/o-PD/ β-cyclodextrin/GOx modified electrode surface; (B) XPS survey scan of the bare Au (blue), as modified Pt-B (green), and as modified Au/Pt-B/o-PD/β-cyclodextrin (red); (C) high-resolution scans of the C1s peaks, and (D) high-resolution scans of the N1s peaks.
